Physics questions and answers

Physics Questions and Answers

If you want to learn more about the nature and properties of matter and energy or you're simply preparing for a Physics exam, these Physics past questions and answers are ideal for you.

1,041.

The general equation of a wave CANNOT be written as

A.

y = A Sin [2 π (\(\frac{t}{T}\) ± Xλ)]

B.

y = A Sin [wt ± kx]

C.

y = A Sin [2 \(\frac{\pi}{\lambda}\) (vt ± x)]

D.

y = A Sin [2π (ft ± \(\frac{X}{\lambda}\) )]

E.

y = A Sin 2 π f(T ± \(\frac{X}{\lambda}\))]

Correct answer is E

No explanation has been provided for this answer.

1,042.

Which of these expresses the relationship between the earth’s magnetic field FE, and the field’ FB due to a magnet at neutral points? FE is

A.

equal and opposite to FB

B.

equal to and in the same direction with FB

C.

greater than and in the same direction with FB

D.

greater than and opposite to FB

E.

less than and opposite to FB

Correct answer is A

No explanation has been provided for this answer.

1,043.

A sheet of white paper viewed through blue glass appears blue because

A.

blue is a primary colour

B.

the glass absorbs all colours except the blue colour

C.

the glass reflects blue colour

D.

the paper reflects blue colour only

E.

white light is easily absorbed by the glass

Correct answer is B

No explanation has been provided for this answer.

1,044.

Which of the following statements is NOT true?

A.

A lead-acid accumulator can deliver a large current because of its very large internal resistance.

B.

A secondary cell can be recharged.

C.

As a lead-acid accumulator is being charged, the density of the acid in it increases.

D.

The chemical action in a primary cell is irreversible.

E.

The conventional current in a circuit rlows from the positive to the negative terminal of the battery.

Correct answer is A

No explanation has been provided for this answer.

1,045.

The volume of a given mass of gas is 40cm3 at 27° C. What is its volume at 90° C if its pressure remains constant?

A.

32.84cm3

B.

40.02cm3

C.

48.40cm3

D.

57.44cm3

E.

72.84cm3

Correct answer is C

No explanation has been provided for this answer.